This case of bilobar agenesis with incidental primary hyperparathyroidism due to single parathyroid adenoma is the www.selleckchem.com/p38-MAPK.html first case reported in literature.”
“Pancreatitis is the most common complication of endoscopic retrograde cholangiopancreatography (ERCP). Risk factors for post-ERCP pancreatitis (PEP) are both patient-related and procedure-related. Identification of patients at high risk for PEP is important in order to target prophylactic measures. Prevention of PEP includes administration of nonsteroidal inflammatory drugs

(NSAIDs), use of specific cannulation techniques, and placement of temporary pancreatic stents. The aim of this guideline commissioned by the European Society of Gastrointestinal Endoscopy (ESGE) is to provide practical, graded, recommendations for the prevention of PEP.”
“Background: The optimal follow-up strategy of non-small cell lung cancer (NSCLC) patients after curative intent therapy is still not established. In a recent prospective study with 100 patients, we showed that a FDG-PET-CT 3 months after radiotherapy (RT) could identify

progression amenable for curative treatment in 2% (95% find more confidence interval (CI): 1-7%) of patients, who were all asymptomatic. Here, we report on the economic evaluation of this study.\n\nPatients and methods: A decision-analytic Markov model was developed in which the longterm cost-effectiveness of 3 follow-up strategies was modelled with different imaging methods 3 months after

therapy: a PET-CT scan; a chest CT scan; and conventional follow-up with a chest X-ray. A probabilistic sensitivity analysis was performed to account for uncertainty. Because the results of the prospective study indicated that the advantage seems to be confined to asymptomatic patients, we additionally examined a strategy where a PET-CT was applied only in the subgroup of asymptomatic patients. Cost-effectiveness of the different follow-up strategies was expressed Akt inhibitor drugs in incremental cost-effectiveness ratios (ICERs), calculating the incremental costs per quality adjusted life year (QALY) gained. Results: Both PET-CT- and CT-based follow-up were more costly but also more effective than conventional follow-up. CT-based follow-up was only slightly more effective than conventional follow-up, resulting in an incremental cost-effectiveness ratio (ICER) of is an element of 264.033 per QALY gained. For PET-CT-based follow-up, the ICER was is an element of 69.086 per QALY gained compared to conventional follow-up. The strategy in which a PET-CT was only performed in the asymptomatic subgroup resulted in an ICER of is an element of 42.265 per QALY gained as opposed to conventional follow-up, With this strategy, given a ceiling ratio of is an element of 80.000, PET-CT-based follow-up had the highest probability of being cost-effective (73%).

Here, we highlight

PERK inhibitor recent progress in the field towards the identification and quantification of the surfaceome as an important subproteome forming the information gateway of the cell.”
“Many neurocognitive models of anxiety emphasize the importance of a hyper-responsive threat-detection system centered on the amygdala, with recent accounts incorporating a role for prefrontal mechanisms in regulating attention to threat. Here we investigated whether trait anxiety is associated with a much broader dysregulation of attentional control. Volunteers performed a response-conflict task under conditions that posed high or low demands on attention. High trait-anxious individuals showed reduced prefrontal activity and slower target identification in response to processing competition when the task did not fully occupy attentional resources.

The relationship between trait anxiety and prefrontal recruitment remained after controlling for state anxiety. These findings indicate that trait anxiety is linked to impoverished recruitment of prefrontal attentional control mechanisms to inhibit distractor processing even when threat-related stimuli are absent. Notably, this deficit was observed when ongoing task-related demands on attention were low, potentially explaining the day-to-day difficulties in concentration that are associated with clinical anxiety.”
“Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by progressive loss of motor neurons. To analyze the

progressive motor deficits during Selleck GSK2879552 the course of this disease, we investigated fatigability and ability of recovery of spinal motor neurons by testing monosynaptic reflex transmission with increasing stimulus frequencies in the lumbar spinal cord of the SOD1(G93A) mouse model for ALS in a comparison with wild-type (WT) mice. Monosynaptic reflexes in WT and SOD1(G93A) mice without behavioral LY411575 molecular weight deficits showed no difference with respect to their resistance to increasing stimulus frequencies. During the progression of motor deficits in SOD1(G93A) mice, the vulnerability of monosynaptic reflexes to higher frequencies-increased, the required time for reflex recovery was extended, and recovery was often incomplete. Fatigability and demand for recovery of spinal motor neurons in SOD1(G93A) mice rose with increasing motor deficits. This supports the assumption that impairment of the energy supply may contribute to the pathogenesis of ALS. Muscle Nerve 43: 230-236, 2011″
“In order to determine the prevalence of methicillin (meticillin)-resistant Staphylococcus aureus (MRSA) colonization among adults in community settings in Taiwan and identify its risk factors, we conducted the present study. For a 3-month period, we enrolled all adults who attended mandatory health examinations at three medical centers and signed the informed consent. Nasal swabs were taken for the isolation of S. aureus.

2) and BVDV/Turkey/Kirikkale/02 (HQ393489.2). Gene sequences

were compared to Mega 4.1 and ClustalW analyzing software.\n\nDiscussion: The BVDV has a world-wide distribution and causes significant economical losses especially on cattle farms. In this study, it was investigated genetic variability of BVDV subtypes by identifying the 5′-UTR nucleotide sequences of two panpestivirus amplicons from field samples. It was found that BVDV-1a and BVDV-2 in terms of BVDV epidemiology is genotyping, 0.625% and 7.5% using RT-nested PCR respectively. Genetic typing is important for the precise classification and molecular epidemiology of BVDV-1 and epidemiological information on currently epidemic viruses is also important for BVDV prevention BMS-754807 datasheet and control. We suggest that vaccines should contain at least one strain of both species in Turkey. The study of genetic diversity of BVDV is useful for the understanding of pestivirus field locations as

well as for epidemiological studies and planning future BVDV control and vaccination programs in Turkey.”
“In this work, the response and adaption of CHO cells to hydrodynamic stress in laboratory scale bioreactors MLN2238 mouse originating from agitation, sparging and their combination is studied experimentally. First, the maximum hydrodynamic stress, tau(max), is characterized over a broad range of operating conditions using a shear sensitive particulate system.

Separate stress regimes are determined, where tau(max) is controlled either by sparging, agitation, or their combination. Such conditions are consequently applied during cultivations of an industrial CHO cell line to determine Mizoribine supplier the cellular responses to corresponding stresses. Our results suggest that the studied CHO cell line has different threshold values and response mechanisms for hydrodynamic stress resulting from agitation or sparging, respectively. For agitation, a characteristic local minimum in viability was found after stress induction followed by viability recovery, while at highest sparging stress a monotonic decrease in viability was observed. If both stresses were combined, also both characteristic stress responses could be observed, amplifying each other. On the other hand, cellular metabolism, productivity and product quality did not change significantly. Transcriptome analysis using mRNA microarrays confirmed that separate adaptation mechanisms are activated in the different stress situations studied, allowing identification of these stresses using a transcriptome fingerprinting approach. Functional analysis of the transcripts was consequently used to improve our understanding of the molecular mechanisms of shear stress response and adaptation. (C) 2014 Elsevier B.V. All rights reserved.

Cell protection effects were also observed for all three compounds, with the protection efficiency being greatest for CA and least for CGA. These findings suggest

that the beneficial effects of coffee consumption on T2DM may be partly due to the ability of the major coffee components and metabolites to inhibit the toxic aggregation of hIAPP.”
“WebEase (Epilepsy Awareness, Support, and Education) is an online epilepsy self-management FDA-approved Drug Library price program to assist people with taking medication, managing stress, and improving sleep quality. The primary study aims were to determine if those who participated in WebEase demonstrated improvements in medication adherence, perceived stress, and sleep quality. Participants were randomized to a treatment (T) or waitlist control (WCL) group (n = 148). At follow-up, participants in the T group reported higher levels of medication adherence than those in the WLC group. Analyses were also conducted comparing those who had completed WebEase modules with those who had not. Those who had completed at least some modules within the WebEase program reported higher levels of self-efficacy and a trend toward significance was observed for the group x

time interactions for medication adherence, perceived stress, self-management, and knowledge. The results highlight the usefulness of online tools to support self-management among A-1331852 people with epilepsy. (C) 2011 Elsevier Inc. All rights reserved.”
“Objectives/Hypothesis: To evaluate changes in growth curve measurements after supraglottoplasty and compare these patterns to patients with laryngomalacia treated conservatively.\n\nStudy Design: Retrospective case-control study.\n\nMethods: Children treated surgically for laryngomalacia were compared to control groups of patients who underwent observation or medical treatment only. Body weight

the day of surgery and on follow-up visits was plotted on a standardized growth curve and the z-score calculated.\n\nResults: A total of 15 patients were included that were observed (group 1), 71 patients that were treated with medical therapy only (group 2), and 29 patients that underwent surgery (group 3). The average z-score at the time of surgery was significantly worse in group 3 (-0.854 +/- 1.080), compared to the z-score at the time of diagnosis in CT99021 research buy group 1 (-0.086 +/- 0.834), and the time when antireflux therapy was initiated in group 2 (-0.120 +/- 0.979). Within 3 months from surgery, significant improvement on the growth curve was seen in group 3 (P = .009). After 12 months, all three groups approached the mean on the growth curve.\n\nConclusions: In this series, patients with severe laryngomalacia who warranted surgery presented with significantly lower percentile weight on a standardized growth curve than patients who required only medical or conservative treatment. Substantial improvement in growth curve percentile was seen in the immediate months following supraglottoplasty.

\n\nMethods: The most efficient conditions for coating of L-selectin-Fc chimera and VE-cadherin-Fc chimera proteins were first determined by protein coating on ELISA plates. The whole processes were repeated on titanium substrates, which are commonly used to coat stents. Endothelial progenitor cells (EPCs) and human umbilical vein endothelial cells (HUVECs) were isolated and characterized by

flow cytometry. Cell attachment, growth, proliferation, viability and surface cytotoxicity were evaluated using nuclear staining and MTT assay. Platelet and cell attachment were evaluated using scanning electron microscopy.\n\nResults: https://www.selleckchem.com/products/azd5582.html Optimal concentration of each protein for surface coating was 50 ng/ml. The efficacy of protein coating was both heat and pH independent. Calcium ions had significant impact on simultaneous dual-protein coating (P<0.05). Coating stability data revealed more than one year stability for these coated proteins at 4 degrees C. L-selectin and VE-cadherin (ratio of 50:50) coated surface showed highest EPC and HUVEC attachment, viability and proliferation

compared to single protein coated and non-coated titanium surfaces (P<0.05). This double coated surface did not show any cytotoxic effect.\n\nConclusions: Surfaces coated with L-selectin and VE-cadherin are friendly surface for EPC and endothelial cell attachment with less platelet attachment. These desirable factors make the L-selectin and VE-cadherin coated surfaces perfect candidate endovascular selleck compound device. (C) 2012 Elsevier

Ireland Ltd. All rights reserved.”
“In addition to the env gene, a 0.3-kb fragment containing the R-U5-5 leader sequence is essential for the induction of spongiform neurodegeneration by Friend murine leukemia virus (Fr-MLV) clone A8 and it also influences expression of the Env protein. Kinetic studies were carried out using two recombinant viruses, R7f, carrying the A8 0.3-kb fragment, and Rec5, carrying the 0.3-kb fragment of the non-neuropathogenic Fr-MLV clone 57. These analyses suggested that the 0.3-kb fragment influenced the buy PRIMA-1MET expression level of the Env protein by regulating the amount of spliced env-mRNA rather than the amount of total viral mRNA or viral production.”
“OBJECTIVES: The present analysis compared clinical and mid-term outcomes of patients with previous cardiac surgery undergoing transapical transcatheter aortic valve implantation (TAVI) with propensity-matched patients undergoing conventional redo aortic valve replacement (cAVR).\n\nMETHODS: Since 2008, 508 patients were treated with TAVI. Fifty-three of these patients presented with a history of cardiac surgery and underwent transapical TAVI using the Edwards SAPIEN bioprosthesis. A propensity-matched control group of 53 patients receiving cAVR was generated out of the hospital’s database. The mean age for all the patients was 77.8 +/- 4.5 years. The logistic EuroSCORE was 28.4 +/- 13.6% in mean, and mean EuroSCORE II was 8.

Here, we review the roles of these kinases in short-term memory formation, memory

consolidation, memory storage, retrieval, reconsolidation, and extinction. Specifically, we discuss the roles of calcium/calmodulin-dependent kinase II (CaMKII), the calcium/calmodulin kinase cascade, extracellular signal regulated kinase 1 and 2 (ERK1/2), cAMP-dependent protein kinase A (PKA), cGMP-dependent protein kinase G (PKG), the phosphatidylinositol 3-kinase (PI3K) pathway, and protein kinase M zeta (PKM zeta). Although these kinases are important for learning Fosbretabulin datasheet and memory processes, much remains to be learned as to how they act. Therefore, it will be important to identify and characterize the critical phosphorylation substrates so that a sophisticated understanding of learning and memory processes will be achieved. This will also allow for a systematic analysis of dysfunctional kinase activity in mental disorders.”
“Background: Activation of GABA(B) receptors Compound C datasheet with baclofen into the lateral parabrachial nucleus (LPBN) induces ingestion of water and 0.3 M NaCl in fluid replete rats. However, up to now, no study has investigated the effects of baclofen injected alone or combined with GABA(B) receptor antagonist into the LPBN on water and 0.3 M NaCl intake in rats with increased plasma osmolarity (rats treated with an intragastric load of 2 M NaCl). Male Wistar rats with stainless steel cannulas implanted

bilaterally into the LPBN were used.\n\nResults: In fluid replete rats, baclofen (0.5 nmol/0.2 mu l), bilaterally injected into the LPBN, induced ingestion

of 0.3 M NaCl (14.3 +/- 4.1 vs. saline: 0.2 +/- 0.2 ml/210 min) and water (7.1 +/- 2.9 vs. saline: 0.6 +/- 0.5 ml/210 min). In cell-dehydrated rats, bilateral injections of baclofen (0.5 and 1.0 nmol/0.2 mu l) into the LPBN induced an increase of 0.3 M NaCl intake (15.6 +/- 5.7 and Selleckchem BMS-777607 21.5 +/- 3.5 ml/210 min, respectively, vs. saline: 1.7 +/- 0.8 ml/210 min) and an early inhibition of water intake (3.5 +/- 1.4 and 6.7 +/- 2.1 ml/150 min, respectively, vs. saline: 9.2 +/- 1.4 ml/150 min). The pretreatment of the LPBN with 2-hydroxysaclofen (GABA(B) antagonist, 5 nmol/0.2 mu l) potentiated the effect of baclofen on 0.3 M NaCl intake in the first 90 min of test and did not modify the inhibition of water intake induced by baclofen in cell-dehydrated rats. Baclofen injected into the LPBN did not affect blood pressure and heart rate.\n\nConclusions: Thus, injection of baclofen into the LPBN in cell-dehydrated rats induced ingestion of 0.3 M NaCl and inhibition of water intake, suggesting that even in a hyperosmotic situation, the blockade of LPBN inhibitory mechanisms with baclofen is enough to drive rats to drink hypertonic NaCl, an effect independent of changes in blood pressure.”
“In species with external development, egg placement is expected to impact the fitness of females and males via offspring survival. Both environmental and social cues influence the placement of eggs.

96 (10.6%) patients had PE confirmed of whom 70 (72.9%) were managed as outpatients.

14 (1.6%) patients have died since attending the clinic; no death was related to PE. This audit shows that ambulatory buy EPZ-6438 investigation and management of selected low risk patients with suspected PE is safe and reduces hospital admissions.”
“Background: Celiac disease (CD) is a global health problem and its prevalence is underestimated, especially in Latin American populations. Our aim was to evaluate the clinical features, psychological factors, and health-related quality of life (QoL), before and after diagnosis, in a representative sample of adult Mexican Mestizo patients presenting with CD. Methods: A cross-sectional analysis was conducted on patients seen at two tertiary referral centers in Mexico. QoL before and after CD diagnosis was evaluated using the EuroQoL 5D, the Hospital Anxiety and Depression Scale (HADS), and the disease-specific Celiac Symptom Index (CSI) questionnaires. Ulixertinib ic50 Results: We included 80 patients (80% were women, with a mean age of 48.6 +/- 14.1 years). The most common symptoms were diarrhea (86%), bloating (77.5%), and abdominal pain (71.3%). Mean symptom duration was 10.33 +/- 6.3 years. Fifty-one patients (63.8%) had a previous diagnosis of irritable bowel syndrome (IBS) and 23 (28.8%) had one

of functional dyspepsia. Questionnaire respondents rated their health status at 50% before diagnosis (0 = worst imaginable state, 100 = best imaginable state) and there was a significant improvement of 26% after diagnosis. Thirty-nine percent of the patients had a CSI score bigger than 45 and they were the ones that had been previously diagnosed most often with IBS (p = 0.13) or dyspepsia (p = .036). Conclusions: At the time of diagnosis, Mexican Mestizo patients with CD had poor QoL. Long-standing symptoms

and a previous diagnosis of functional disorders were associated with worse QoL. As in other populations, our results support the need for a detailed examination of cost-effective strategies for increasing CD awareness in clinical practice.”
“Aims: Ventricular septal defect (VSD) is the most common congenital heart disease (CHD). A number of genetic studies have linked the gene of PLAGL1 to the etiology of CHD. The present study aimed to identify potential pathogenic mutations for selleck inhibitor PLAGL1 and to provide insights into the etiology of isolated VSD. Methods: Case-control mutational analysis was performed in 300 patients with isolated VSD and 300 healthy controls. Two protein-coding extons of PLAGL1 and their partial flanking intron sequences were amplified by polymerase chain reaction and sequenced on an ABI3730 Automated Sequencer. CLC workbench software was used to compare the conservatism of PLAGL1 protein with other multiple species. Results: Neither missense nor frame-shift mutations were detected in two protein-coding extons of PLAGL1. But a novel synonymous variation (c.486A>G, p.

The age

at disease diagnosis was lower in carriers of the ESR1 rs9340799 A allele compared with GG homozygotes as well as in patients with ESR1 rs2234693 TT and CT genotypes compared with CC homozygotes. There was no significant association of the genotypes with rheumatoid factor (RF), erosive disease, extra-articular manifestations, or anti-cyclic citrullinated peptide (anti-CCP) antibodies.\n\nConclusions: The results of the study suggest that polymorphisms in the ESR1 gene may be associated with the age of onset of RA.”
“Objective: To determine whether ovaries can be preserved in selected young women with peritoneal pseudomyxoma (PMP).\n\nBackground data: The traditional URMC-099 price rule is to systematically perform a bilateral oophorectomy.\n\nPatients and methods: A new policy was developed to preserve the ovaries when they are macroscopically normal in young women with PMP, strongly desiring a future pregnancy.\n\nResults: Thirty-three women younger than 41 years were

selected after undergoing complete cytoreductive surgery plus hyperthermic intraperitoneal chemotherapy for PMP. A normal ovary was preserved in 6 of them, but in HKI 272 6 of the 14 women who strongly desired a future pregnancy. Subsequently, ovarian preservation was only performed in cases of grade-1 PMP. Ovarian invasion was correlated with the grade (p < 0.05) and with the extent of peritoneal disease (p < 0.01). After

a median follow-up of 54 months, none of the 6 women with preserved ovaries has developed an ovarian or a peritoneal recurrence. One woman became pregnant CB-839 research buy and egg harvesting and cryopreservation were performed for 4 women with a partially normal ovary.\n\nConclusion: This new policy allowed ovarian preservation in 43% of the young women desiring a future pregnancy and has already resulted in one birth. It exclusively concerned low-grade PMP. Recurrence in the preserved ovary was 0% with our selection criteria. (C) 2013 Elsevier Ltd. All rights reserved.”
“Background: The aim of the study was to identify the relationship between ‘Health Belief Model Scale for Cervical Cancer and the Pap Smear Test’ subscale scores and demographic/gyneco-obstetric characteristics. Materials and Methods: This cross-sectional study was conducted with 256 women. Data were obtained using the ‘Demographic and Gyneco-Obstetric Identification Form’ and the ‘Health Belief Model Scale for Cervical Cancer and the Pap Smear Test. Results: The percentage of women who had heard about the Pap test was 77.7 whereas only 32.4% had actually undergone the test. Some 45.7% of the women stated that they did not know the reason for having a Pap test. Women who had obtained a Pap smear test had statistically significantly fewer perceived barriers than those who had never had (p<0.05).

3 and 30.67% increase in permeability, respectively). Additionally, THP and THDOC reduced the effect of TAA and galactosamine on BBB permeability, while no BBB protective effect was observed following treatment with azoxymethane.

These findings suggest that ammonia does not cause a significant BBB disruption, and that the BBB is intact in the TAA or galactosamine-induced animal models of ALF, likely due to the protective effect of neurosteroids that are synthesized in brain in the setting of ALF. However, caution should be exercised when using azoxymethane as an experimental model of ALF as it caused a severe breakdown of the BBB, and neurosteriods failed to protect against this breakdown. (C) 2013 Elsevier Inc. All rights reserved.”
“Two new cell-trappable Lapatinib cost fluorescent probes for nitric oxide (NO) are see more reported based on either incorporation of hydrolyzable esters or conjugation to aminodextran polymers. Both probes are highly selective for NO over

other reactive oxygen and nitrogen species (RONS). The efficacy of these probes for the fluorescence imaging of nitric oxide produced endogenously in Raw 264.7 cells is demonstrated.”
“A proteochemometrics model was induced from all interaction data in the BindingDB database, comprizing in all 7078 protein-ligand complexes with representatives from all major drug target categories. Proteins were represented by alignment-independent sequence descriptors holding information on properties such as hydrophobicity, charge, and secondary structure. Ligands were represented by commonly used QSAR descriptors. The inhibition constant (pK(i)) values of protein-ligand complexes were discretized into “high” and “low” interaction activity. Different machine-learning techniques were used to induce models relating protein and

ligand properties to the interaction activity. The best was decision trees, which gave an accuracy of 80% and an area under the ROC curve of 0.81. The tree pointed to the protein and ligand properties, which are relevant for the interaction. As the Selleck PND-1186 approach does neither require alignments nor knowledge of protein 3D structures virtually all available protein-ligand interaction data could be utilized, thus opening a way to completely general interaction models that may span entire proteomes.”
“ObjectivesThe timing of major elective operations is a potentially important but rarely examined outcome variable. This study examined elective pancreaticoduodenectomy (PD) timing as a perioperative outcome variable. MethodsConsecutive patients submitted to PD were identified. Determinants of 90-day morbidity (prospectively graded and tracked), anastomotic leak or fistula, and mortality, including operation start time (time of day), day of week and month, were assessed in univariate and multivariate analyses. Operation start time was analysed as a continuous and a categorical variable. ResultsOf the 819 patients identified, 405 (49.

According to a multivariate analysis, the survival time was independently associated with tumor location, tumor markers, and lymph node metastases. The patients with tumors in the upper one third of the stomach, elevated tumor markers, and extended lymph node metastases can not be controlled by surgery alone.”
“The effect of replacing corn meal with mango meal in diets of feedlot lambs was evaluated. Apparent digestibility and intakes of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), organic matter (OM) (EE), gross energy (GE),

digestible energy (DE), non-fiber carbohydrates (NFC) and total carbohydrates (TC) were evaluated. Twenty-four Santa Ines lambs were distributed in a randomized design with four treatments, consisting of the replacement levels of corn meal by mango (0, 33, 66 and 100%) with six replicates. The fecal dry matter was estimated using LIPE check details (R) external marker. There is no effect of mango meal inclusion levels on the intake and apparent digestibility. The intakes of GE and DE in kcal/gDM increase linearly with mango meal inclusion. The mango meal can replace corn in diets for lambs without compromising the intake and digestibility of nutrients, indicating

potential as an alternative feed.”
“Most mitochondrial proteins are synthesized in the cytosol and directed into the organelle; matrix proteins contain presequences that guide them through translocases in contact sites of the outer and inner membrane. In contrast, the import of many intermembrane space proteins depends on cysteine residues and the oxidoreductase BVD-523 Mia40. Here,

we show that both import machineries can cooperate in the biogenesis of matrix proteins. Mrp10, a conserved protein of the mitochondrial ribosome, interacts with Mia40 during passage into the matrix. Mrp10 contains an unconventional proline-rich matrix-targeting sequence that renders import intermediates accessible to Mia40. Although oxidation of Mrp10 is KU-55933 mouse not essential for its function in mitochondrial translation, the disulfide bonds prevent proteolytic degradation of Mrp10 and thereby counteract instability of the mitochondrial genome. The unconventional import pathway of Mrp10 is presumably part of a quality-control circle that connects mitochondrial ribosome biogenesis to the functionality of the mitochondrial disulfide relay.”
“Nitrobenzene (NB) has become an important pollutant in the environment, but its potential effects on non-target species such as drake remain unknown. In this study, we investigated the oxidative stress response, the CYP450 system and histopathological changes of the liver of NB-treated drakes for 40 d. Our results indicated that NB induced significant changes in antioxidant enzyme (SOD, CAT and GSH-Px) activities and the MDA content in the liver of the drakes.